Android简易电话拨号器实例详解

安卓开发简易电话拨号器，具体内容如下

我是基于安卓4.2.2开发的，下面是我写的MainActivity.java代码：

package com.example.phone; 

import android.support.v7.app.ActionBarActivity;
import android.support.v4.app.Fragment;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText; 

public class MainActivity extends ActionBarActivity { 

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main); 

    if (savedInstanceState == null) {
      getSupportFragmentManager().beginTransaction()
          .add(R.id.container, new PlaceholderFragment()).commit();
    }
  } 

  @Override
  public boolean onCreateOptionsMenu(Menu menu) { 

    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  } 

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
      return true;
    }
    return super.onOptionsItemSelected(item);
  } 

  /**
   * A placeholder fragment containing a simple view.
   */
  public static class PlaceholderFragment extends Fragment { 

    public PlaceholderFragment() {
    } 

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
      View rootView = inflater.inflate(R.layout.fragment_main, container, false); 

      final EditText numberText=(EditText) rootView.findViewById(R.id.number);
      Button button=(Button)rootView.findViewById(R.id.button); 

      button.setOnClickListener(new OnClickListener()
      { 

        @Override
        public void onClick(View v) { 

          String number=numberText.getText().toString();
          Intent intent = new Intent(Intent.ACTION_CALL,Uri.parse("tel:"+number));
          startActivity(intent); 

          // TODO Auto-generated method stub 

        } 

      });
      return rootView;
    }
  } 

}

布局文件我就不贴出来了，需要注意的是项目清单文件（AndroidManifest.xml )中需要加入perimission: <uses-permission android:name="android.permission.CALL_PHONE"/>.我是安卓初学者，希望对和我一样的初学者有所帮助。

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